10102102001989 has 2 divisors, whose sum is σ = 10102102001990. Its totient is φ = 10102102001988.

The previous prime is 10102102001917. The next prime is 10102102002011. The reversal of 10102102001989 is 98910020120101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6873090668964 + 3229011333025 = 2621658^2 + 1796945^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102102001989 - 2⁷ = 10102102001861 is a prime.

It is a super-2 number, since 2×10102102001989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10102102001909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051051000994 + 5051051000995.

It is an arithmetic number, because the mean of its divisors is an integer number (5051051000995).

Almost surely, 2^{10102102001989} is an apocalyptic number.

It is an amenable number.

10102102001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102102001989 is an equidigital number, since it uses as much as digits as its factorization.

10102102001989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 10102102001989 in words is "ten trillion, one hundred two billion, one hundred two million, one thousand, nine hundred eighty-nine".